Sentence examples for product ciphers from inspiring English sources

(See Product ciphers, below).

In the days of manual cryptography, product ciphers were a useful device for cryptographers, and in fact double transposition or product ciphers on key word-based rectangular matrices were widely used.

In the days of manual cryptography this was a useful device for the cryptographer, and in fact double transposition or product ciphers on key word-based rectangular matrices were widely used.

Nevertheless, by the end of the war some complicated cipher systems were used for high-level communications, the most famous of which was the German ADFGVX fractionation cipher, described in the section Cryptography: Product ciphers.

There was also some use of a class of product ciphers known as fractionation systems, wherein a substitution was first made from symbols in the plaintext to multiple symbols (usually pairs, in which case the cipher is called a biliteral cipher) in the ciphertext, which was then encrypted by a final transposition, known as superencryption.

Product cipher, data encryption scheme in which the ciphertext produced by encrypting a plaintext document is subjected to further encryption.

In contemporary cryptography, transpositions serve principally as one of several encryption steps in forming a compound or product cipher.

It may seem that DES is very different from the cryptosystems that preceded it except that it is a product cipher made up of transpositions and substitutions but it is in fact a logical continuation of them.

In addition to the secret sensing matrix, a CS-based cryptosystem may employ an extra cryptographic primitive, which can be considered as a product cipher.

In order to make possible a single iteration of the chaotic systems while maintaining high security standards, the proposed scheme combines a simple chaotic stream cipher and two simple chaotic block ciphers (with time variant S-boxes) to implement a complex product cipher.

The DES is a product block cipher in which 16 iterations, or rounds, of substitution and transposition (permutation) process are cascaded.